Stuffing-box packing for cold-water pumps.



No. 674,902. Patented May 28, l90l.

M. CAREN.

ySTUFFING BOX PACKINEFDR GOLD WATER PUMPS.

(A'ppucmuu med my 12, 1900.)-

(llo Model.)

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y UNTTED STATES PATENT EETCE.

MARCUS CAHEN, OF MLHEI'M, GERMANY.

STUFlFlNG-BOX PACKING FORl COLD-WATER FUIVIPS.4

SPECIFICATION forming part Of Letters :Patent N0. 674,902, dated May 28,190]..

Application filed May 12, 1900. Serial No. 16,512. (No model.) 4

To all whom, it ntftg/ concern:

Be it known that I, MARCUS CAHEN, manufacturer', a subject of theEmperor of Germany, and a resident of No. 66 Regentenstrasse,Mlheim-on-the-Rhine, in the Empire of Germany, have invented a certainnew and useful Improved Stuffing- Box Packing for Cold-VVater Pumps, ofwhich the following is an exact, full, and clear description.

This invention relates to an improved stuftingbox packing which consistsof strips or pieces of ani mal-skin sewed together or united in anyother suitable manner, such skin having undergone a special treatment inorder to become so porous and capable of receiving lubricating materialthat the packing can be termed self-lubricating.

The accompanying drawing shows a longitu dinal section of a stLifting-box with the packing u produced according to the presentprocess, the shaft or rod being indicated at b, the

wall through which it passes at c, and the packingconfining ring orsleeve at d, these latter parts being of the ordinary or any desiredconstruction.

After the usual cleaning and preparation the animal-skin is put into abath of castoroil or other suitable oil for a suiicient period, so as tothoroughly impregnate the skin with such oil. The excessive or surplusoil is removed by packing the skin in sawdust, infusorial earth, or anyother absorbing material. The skin, which is thus thoroughly impregnatedwith oil, is then subjected to a weak chrome-tanning process for alonger period in order to be rendered resistible, and finally dried.Such prepared skin from which packing-strips are made has the advantageof be ing very porous and having a great resisting force against wearand tear and is specially adapted for packings, Vin that it neithershrinks nor becomes hard and exerts alubrieating action on the partscarried by the packing.

The leather used hitherto for packings is lspecially nnadapted for stufling-box packi n gs,

because tanned leather becomes hard and shrinks, and for this reason thepackings provided with such leather become loose. Alu mleather affectsthe metal part-s of the packing too much, and leather dressed with oilhas too little resisting force and is also too hard and brittle forproducing packings adapted to be utilized for a longer period. For thisreason combined materials have hitherto generally been used forstu'liing-box packings, which', according to experience, rapidly wearout, so that it is necessary to frequently replace the same, whichcauses loss of time and expense.

Having now particularly described and ascertained the nature of the saidinvention, I declare that what I claim, and wish to secure by LettersPatent, is

vl. The improved process of making leather stuffing-box packing,con'iprising cleaning the skins or hides, impregnating the saine withoil, eliminating surplus oil, then subjecting the same to a weakchrome-tanning process, and then cutting the hides or skins into stripsand uniting the strips.

2. A stuffing-box packing comprisinga series of united strips of hide orskinwhich have been previously impregnated with oil and subjected to aweak chrome tanning process.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

MARCUS CAHEN.

Witnesses:

H. WERNER, W. WIEsEL.

